10-Day Weather Forecast - Port Costa, CA

Partly cloudy in the morning then becoming sunny. Highs in the 80s. Southwest winds 5 to 15 mph.

Clear. Lows in the mid 50s. Southwest winds 5 to 15 mph.

Partly cloudy in the morning then becoming sunny. Highs in the mid 80s to lower 90s. West winds 5 to 10 mph.

Clear. Lows in the upper 50s.

Mostly clear. Highs in the 80s to lower 90s. Lows in the upper 50s.

Mostly clear. Highs in the 80s to lower 90s. Lows in the upper 50s.

Partly cloudy. Highs near 90. Lows in the lower 60s.

Partly cloudy. Highs near 90. Lows in the lower 60s.

Mostly cloudy in the morning then becoming partly cloudy. Highs in the mid 80s to lower 90s.

Partly cloudy. Lows in the lower 60s. Highs around 90.

Partly cloudy. Lows in the lower 60s. Highs around 90.

Clear. Low temperature around 60F. Dew point will be around 52F with an average humidity of 64%. Winds will be 10 mph from the SW.

Sunny. High temperature around 84F. Dew point will be around 56F with an average humidity of 55%. Winds will be 11 mph from the SW.

Clear. Low temperature around 59F. Dew point will be around 52F with an average humidity of 62%. Winds will be 11 mph from the SW.

Sunny. High temperature around 83F. Dew point will be around 57F with an average humidity of 52%. Winds will be 10 mph from the SW.

Clear. Low temperature around 60F. Dew point will be around 54F with an average humidity of 65%. Winds will be 11 mph from the SW.

Sunny. High temperature around 83F. Dew point will be around 58F with an average humidity of 54%. Winds will be 10 mph from the SW.

Clear. Low temperature around 60F. Dew point will be around 55F with an average humidity of 68%. Winds will be 11 mph from the SW.